From owner-dev-commits-src-main@freebsd.org Mon Jul 5 00:23:48 2021 Return-Path: Delivered-To: dev-commits-src-main@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D0ED4650151; Mon, 5 Jul 2021 00:23:48 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4GJ5yX4Czlz4tGy; Mon, 5 Jul 2021 00:23:48 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 5B4FD1C1E9; Mon, 5 Jul 2021 00:23:48 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 1650NmMi022661; Mon, 5 Jul 2021 00:23:48 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 1650Nmn3022660; Mon, 5 Jul 2021 00:23:48 GMT (envelope-from git) Date: Mon, 5 Jul 2021 00:23:48 GMT Message-Id: <202107050023.1650Nmn3022660@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Vladimir Kondratyev Subject: git: 019391bf8527 - main - LinuxKPI: Implement strscpy MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: wulf X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 019391bf852771070cb739900f9e20ae6c41c746 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Jul 2021 00:23:49 -0000 The branch main has been updated by wulf: URL: https://cgit.FreeBSD.org/src/commit/?id=019391bf852771070cb739900f9e20ae6c41c746 commit 019391bf852771070cb739900f9e20ae6c41c746 Author: Vladimir Kondratyev AuthorDate: 2021-07-05 00:20:42 +0000 Commit: Vladimir Kondratyev CommitDate: 2021-07-05 00:20:42 +0000 LinuxKPI: Implement strscpy strscpy copies the src string, or as much of it as fits, into the dst buffer. The dst buffer is always NUL terminated, unless it's zero-sized. strscpy returns the number of characters copied (not including the trailing NUL) or -E2BIG if len is 0 or src was truncated. Currently drm-kmod replaces strscpy with strncpy that is not quite correct as strncpy does not NUL-terminate truncated strings and returns different values on exit. Reviewed by: hselasky, imp, manu MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D31005 --- sys/compat/linuxkpi/common/include/linux/string.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/string.h b/sys/compat/linuxkpi/common/include/linux/string.h index 39201e203162..659a48d93596 100644 --- a/sys/compat/linuxkpi/common/include/linux/string.h +++ b/sys/compat/linuxkpi/common/include/linux/string.h @@ -167,4 +167,20 @@ str_has_prefix(const char *str, const char *prefix) return (strncmp(str, prefix, len) == 0 ? len : 0); } +static inline ssize_t +strscpy(char* dst, const char* src, size_t len) +{ + size_t i; + + if (len <= INT_MAX) { + for (i = 0; i < len; i++) + if ('\0' == (dst[i] = src[i])) + return ((ssize_t)i); + if (i != 0) + dst[--i] = '\0'; + } + + return (-E2BIG); +} + #endif /* _LINUX_STRING_H_ */